Adjustable wrist-pin and bearing therefor.



W. B. ROYER. ADJUSTABLE. WRIST PINND BEARING THEREFOR.`

APPLICATION FILED MAH. l5. 19H..

Patented June 4, 19m

to construct a bearing .whereb nuten WILLIAM BGYE'R, OF BALTIMORE,MARYLAND, SSIGNOR OF ONE-HALF 'I'O EUGENE B. LINK, 0F BALTIMORE,MARYLAND.

-Speciication of vLetters Patent.

Patented lune d, 12112.

` Application lled March 1 5, 1917. Serial No. 155,034.

To al?, whom z'timay concern:

Be it known that I, WILLIAM B. ROYER, a citizen of the United States,residing at Baltimore, State of Maryland, have invented certain new anduseful Improvements in Adjustable Wrist-Pins and Bearings Therefor, ofwhich the following is a specification, reference being had therein tothe accompanying drawing.

This invention relates to new and usefpl improvements in bearings usedin combination with connecting rods, and more particularly to bearingsadapted to permit readjustment thereof to compensate-for wear.

.The main feature of the, resent invention resides in the provision omeans for per- .from the top` of the cylinder without the necessity ofremoving'the piston from the cylinder.

A further object is to provide a device of this character which willpermit of such adjustment while the connecting rod is in its operativeosition or within the piston.-

- A still urther object of the inventionis the, wear upon the bearingsurfaces -will e'taken up and a roper lit between the rotating memberand parts between which'it is journaled will be maintained b a simpleadjustment throughout the life o the engine.

The invention comprises various other details of construction,combinations and arrangements of parts which will be` hereinafter fullydescribed, shown in the accomanying drawings and then specificallydelI-ined in the appended claims.

I illustrate my invention in theaccompanying drawings, in which: 4Figurel is a sectional view" of a piston and a connecting rod securedthereto Fig.' 2 is a sectional view taken at right angles to Fig.` 1.

` Fig. 3 is a face view of one of the ends of the wrist pins.

Fig. 4 is a detailJ view of one end of the wrist pin, and v Fig., 5 isan elevation, artl the wrench especially a apted invention. l eferencenow beinghad to the details ofthe drawings by numerals, 1 designates apiston having suitable piston ring .grooves 2,

in section, of for use with and an upper central threaded opening 3,-

` of the suitable wrench, shown in Fig.

arranged centrally of the head 4, said openingbeing closed by a cap orthreaded plug 5 having Ia depression 6 for the reception 5 said wrench;having suitably constructed jaws 5 and 6'..

In the piston 1 are openings or bearings f?, dispose at diametricallyopposite points, in which are positioned the ends4 8 of the wrist pin9,v the ends 8 having longitudinal slots 10 and to permit expansionthereof, being interiorly threaded to receive the tapered expandingcones 11. It will thus be seen that, when the cones 11 are roperlypositioned -within the ends 8 of t e wrist Y pin 9, the exterior wallsof the ends 8 are mitting the ready adj ustment of' the bearing orcedinto frictional contactwith the bear-v ings 7 and the wrlst pin isthereby securely positioned within the piston 1.

Pivotally connected to the wrist pin 9 is 1 the usual connecting rod 12having a yoke 13 which is provided with a threaded opening 14 to receivethe threaded nut 15, the threaded nut 15 being also provided with asquared portion 16 to permit the same to be engaged by a suitable wrenchin the event that an adjustment is to be made. rIhis nut 15 has acircular enlargement 17 on -its lower end fitting in a suitable circularde pression V18 formedin the upper bearin lock 19, the under sideofwhich is curve toreceive a correspondingly curved bearingA member 20.4The bearing member 20 co-, operates with 'a similarly curved bearingmember 21 for embracing the wrist pin 9 and forming the complete bearingfor the. connecting rod"12. As clearly shown in the drawing, the bearingmember l21 seats ina curved portion 22 of the connecting rod 12 andforms the stationary section of the wrist pin bearing. Each of thebearing members and 21 is provided withv an extension 2d seated insuitable recesses 22 in order that circumferential movement thereof withref lation to the wristl pin 9 will be obviated.

In order to insure the expanding cones 11 from becoming displaced, Ihave provided openings 22 adjacent to the ends of the wrist in 9, which'openingsl accommodate the en of the expansion ls'prin s 2 3, the sameengaging the outer edge of t e expansion nuts 11 and thereby preventingrotary at"j een

Worn, it will be seen that it is only necessary to remove the plug orcap 5, insert a suitable tool in the openings 3 and rotate the member 15with the result that the bearing 2O is again moved into engagement withthe wrist pin 9 and all lost motion obviated.

What I claim to be new is 1. In combination, a hollow piston having acentral opening in the head thereof, a wrist pin connecting the innerwalls thereof, a connecting rod connected to the wrist pin, a stationaryand a movable bearin member carried by the connecting rod, an means formoving the movable bearing member into engagement with the wrist pin tocompensate for wear, said means being accessible through the centralopening.

2. In combinatioma hollow piston having an opening in` the head thereof,a wrist pin in the piston, a connecting rod having an apertured yoke, astationary bearing member carried by the connecting rod, a threaded nutpositioned in the opening of the yoke, said nut having a circularenlargement, a bearing block having a recess to receive the circularenlargement, said bearing block embracing a bearing member, means 3. Incombination, a hollow piston rod having oppositely disposed bearings, awrist pin 'having expansible ends, positioned in the bearings, anexpanding cone in each end of the wrist pin, a connecting rod having oneend pivotally connected to the wrist pin', and an adjustable bearingmember for compensating for wear of the wrist pin.

4. In combination, a hollow piston, a wrist pin in the piston, aconnecting rod connected to the wrist pin, an adjustable bearinginterposed between the wrist pin and connecting rod, said piston havingmeans to permit access to the adjustable bearing without removing theconnecting rod from the piston.

In testimony whereof I hereunto aflix myv signature in presence of twowitnesses.

WILLIAM B. RYER. Witnesses: i. c v

FRANKLIN HoUeH, A. R. FowLER.

